CVE-2025-52991

3.2 lowEPSS 0.2%

Low (3.2). EPSS 0.2% chance of exploitation in the next 30 days.

The Nix, Lix, and Guix package managers default to using temporary build directories in a world-readable and world-writable location. This allows standard users to deceive the package manager into using directories with pre-existing content, potentially leading to unauthorized actions or data manipulation. This affects Nix before 2.24.15, 2.26.4, 2.28.4, and 2.29.1; Lix before 2.91.2, 2.92.2, and 2.93.1; and Guix before 1.4.0-38.0e79d5b.

Severity

CVSS 3.1

3.2 low

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 6% of CVEs (scores of 2026-10-31)
CWE: CWE-276
Published: 2025-06-27
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

References

https://discourse.nixos.org/t/security-advisory-privilege-escalations-in-nix-lix-and-guix/66017
https://guix.gnu.org/en/blog/2025/privilege-escalation-vulnerabilities-2025/
https://labs.snyk.io
https://lix.systems/blog/2025-06-24-lix-cves/
https://security-tracker.debian.org/tracker/CVE-2025-52991

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